<!doctype html> <html lang="en-us"> <head> <title>stream : Real-time Whisper transcription in WebAssembly</title> <style> #output { width: 100%; height: 100%; margin: 0 auto; margin-top: 10px; border-left: 0px; border-right: 0px; padding-left: 0px; padding-right: 0px; display: block; background-color: black; color: white; font-size: 10px; font-family: 'Lucida Console', Monaco, monospace; outline: none; white-space: pre; overflow-wrap: normal; overflow-x: scroll; } </style> </head> <body> <div id="main-container"> <b>stream : Real-time Whisper transcription in WebAssembly</b> <br><br> You can find more about this project on <a href="https://github.com/ggerganov/whisper.cpp/tree/master/examples/stream.wasm">GitHub</a>. <br><br> <b>More examples:</b> <a href="https://whisper.ggerganov.com/">main</a> | <a href="https://whisper.ggerganov.com/bench">bench</a> | <a href="https://whisper.ggerganov.com/stream">stream</a> | <a href="https://whisper.ggerganov.com/command">command</a> | <a href="https://whisper.ggerganov.com/talk">talk</a> | <br><br> <hr> Select the model you would like to use, click the "Start" button and start speaking <br><br> <div id="model-whisper"> Whisper model: <span id="model-whisper-status"></span> <button id="fetch-whisper-tiny-en" onclick="loadWhisper('tiny.en')">tiny.en (75 MB)</button> <button id="fetch-whisper-base-en" onclick="loadWhisper('base.en')">base.en (142 MB)</button> <br><br> Quantized models:<br><br> <button id="fetch-whisper-tiny-en-q5_1" onclick="loadWhisper('tiny-en-q5_1')">tiny.en (Q5_1, 31 MB)</button> <button id="fetch-whisper-base-en-q5_1" onclick="loadWhisper('base-en-q5_1')">base.en (Q5_1, 57 MB)</button> <span id="fetch-whisper-progress"></span> <!-- <input type="file" id="file" name="file" onchange="loadFile(event, 'whisper.bin')" /> --> </div> <br> <div id="input"> <button id="start" onclick="onStart()" disabled>Start</button> <button id="stop" onclick="onStop()" disabled>Stop</button> <button id="clear" onclick="clearCache()">Clear Cache</button> </div> <br> <div id="state"> Status: <b><span id="state-status">not started</span></b> <pre id="state-transcribed">[The transcribed text will be displayed here]</pre> </div> <hr> Debug output: <textarea id="output" rows="20"></textarea> <br> <b>Troubleshooting</b> <br><br> The page does some heavy computations, so make sure: <ul> <li>To use a modern web browser (e.g. Chrome, Firefox)</li> <li>To use a fast desktop or laptop computer (i.e. not a mobile phone)</li> <li>Your browser supports WASM <a href="https://webassembly.org/roadmap/">Fixed-width SIMD</a></li> </ul> <div class="cell-version"> <span> | Build time: <span class="nav-link">@GIT_DATE@</span> | Commit hash: <a class="nav-link" href="https://github.com/ggerganov/whisper.cpp/commit/@GIT_SHA1@">@GIT_SHA1@</a> | Commit subject: <span class="nav-link">@GIT_COMMIT_SUBJECT@</span> | <a class="nav-link" href="https://github.com/ggerganov/whisper.cpp/tree/master/examples/stream.wasm">Source Code</a> | </span> </div> </div> <script type="text/javascript" src="helpers.js"></script> <script type='text/javascript'> // web audio context var context = null; // audio data var audio = null; var audio0 = null; // the stream instance var instance = null; // model name var model_whisper = null; var Module = { print: printTextarea, printErr: printTextarea, setStatus: function(text) { printTextarea('js: ' + text); }, monitorRunDependencies: function(left) { }, preRun: function() { printTextarea('js: Preparing ...'); }, postRun: function() { printTextarea('js: Initialized successfully!'); } }; // // fetch models // let dbVersion = 1 let dbName = 'whisper.ggerganov.com'; let indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB function storeFS(fname, buf) { // write to WASM file using FS_createDataFile // if the file exists, delete it try { Module.FS_unlink(fname); } catch (e) { // ignore } Module.FS_createDataFile("/", fname, buf, true, true); printTextarea('storeFS: stored model: ' + fname + ' size: ' + buf.length); document.getElementById('model-whisper-status').innerHTML = 'loaded "' + model_whisper + '"!'; if (model_whisper != null) { document.getElementById('start').disabled = false; document.getElementById('stop' ).disabled = true; } } function loadWhisper(model) { let urls = { 'tiny.en': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin', 'base.en': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en.bin', 'tiny-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en-q5_1.bin', 'base-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en-q5_1.bin', }; let sizes = { 'tiny.en': 75, 'base.en': 142, 'tiny-en-q5_1': 31, 'base-en-q5_1': 57, }; let url = urls[model]; let dst = 'whisper.bin'; let size_mb = sizes[model]; model_whisper = model; document.getElementById('fetch-whisper-tiny-en').style.display = 'none'; document.getElementById('fetch-whisper-base-en').style.display = 'none'; document.getElementById('fetch-whisper-tiny-en-q5_1').style.display = 'none'; document.getElementById('fetch-whisper-base-en-q5_1').style.display = 'none'; document.getElementById('model-whisper-status').innerHTML = 'loading "' + model + '" ... '; cbProgress = function(p) { let el = document.getElementById('fetch-whisper-progress'); el.innerHTML = Math.round(100*p) + '%'; }; cbCancel = function() { var el; el = document.getElementById('fetch-whisper-tiny-en'); if (el) el.style.display = 'inline-block'; el = document.getElementById('fetch-whisper-base-en'); if (el) el.style.display = 'inline-block'; el = document.getElementById('fetch-whisper-tiny-en-q5_1'); if (el) el.style.display = 'inline-block'; el = document.getElementById('fetch-whisper-base-en-q5_1'); if (el) el.style.display = 'inline-block'; el = document.getElementById('model-whisper-status'); if (el) el.innerHTML = ''; }; loadRemote(url, dst, size_mb, cbProgress, storeFS, cbCancel, printTextarea); } // // microphone // const kSampleRate = 16000; const kRestartRecording_s = 120; const kIntervalAudio_ms = 5000; // pass the recorded audio to the C++ instance at this rate var mediaRecorder = null; var doRecording = false; var startTime = 0; window.AudioContext = window.AudioContext || window.webkitAudioContext; window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext; function stopRecording() { Module.set_status("paused"); doRecording = false; audio0 = null; audio = null; context = null; } function startRecording() { if (!context) { context = new AudioContext({ sampleRate: kSampleRate, channelCount: 1, echoCancellation: false, autoGainControl: true, noiseSuppression: true, }); } Module.set_status(""); document.getElementById('start').disabled = true; document.getElementById('stop').disabled = false; doRecording = true; startTime = Date.now(); var chunks = []; var stream = null; navigator.mediaDevices.getUserMedia({audio: true, video: false}) .then(function(s) { stream = s; mediaRecorder = new MediaRecorder(stream); mediaRecorder.ondataavailable = function(e) { chunks.push(e.data); var blob = new Blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); var reader = new FileReader(); reader.onload = function(event) { var buf = new Uint8Array(reader.result); if (!context) { return; } context.decodeAudioData(buf.buffer, function(audioBuffer) { var offlineContext = new OfflineAudioContext(audioBuffer.numberOfChannels, audioBuffer.length, audioBuffer.sampleRate); var source = offlineContext.createBufferSource(); source.buffer = audioBuffer; source.connect(offlineContext.destination); source.start(0); offlineContext.startRendering().then(function(renderedBuffer) { audio = renderedBuffer.getChannelData(0); //printTextarea('js: audio recorded, size: ' + audio.length + ', old size: ' + (audio0 == null ? 0 : audio0.length)); var audioAll = new Float32Array(audio0 == null ? audio.length : audio0.length + audio.length); if (audio0 != null) { audioAll.set(audio0, 0); } audioAll.set(audio, audio0 == null ? 0 : audio0.length); if (instance) { Module.set_audio(instance, audioAll); } }); }, function(e) { audio = null; }); } reader.readAsArrayBuffer(blob); }; mediaRecorder.onstop = function(e) { if (doRecording) { setTimeout(function() { startRecording(); }); } }; mediaRecorder.start(kIntervalAudio_ms); }) .catch(function(err) { printTextarea('js: error getting audio stream: ' + err); }); var interval = setInterval(function() { if (!doRecording) { clearInterval(interval); mediaRecorder.stop(); stream.getTracks().forEach(function(track) { track.stop(); }); document.getElementById('start').disabled = false; document.getElementById('stop').disabled = true; mediaRecorder = null; } // if audio length is more than kRestartRecording_s seconds, restart recording if (audio != null && audio.length > kSampleRate*kRestartRecording_s) { if (doRecording) { //printTextarea('js: restarting recording'); clearInterval(interval); audio0 = audio; audio = null; mediaRecorder.stop(); stream.getTracks().forEach(function(track) { track.stop(); }); } } }, 100); } // // main // var nLines = 0; var intervalUpdate = null; var transcribedAll = ''; function onStart() { if (!instance) { instance = Module.init('whisper.bin'); if (instance) { printTextarea("js: whisper initialized, instance: " + instance); } } if (!instance) { printTextarea("js: failed to initialize whisper"); return; } startRecording(); intervalUpdate = setInterval(function() { var transcribed = Module.get_transcribed(); if (transcribed != null && transcribed.length > 1) { transcribedAll += transcribed + '<br>'; nLines++; // if more than 10 lines, remove the first line if (nLines > 10) { var i = transcribedAll.indexOf('<br>'); if (i > 0) { transcribedAll = transcribedAll.substring(i + 4); nLines--; } } } document.getElementById('state-status').innerHTML = Module.get_status(); document.getElementById('state-transcribed').innerHTML = transcribedAll; }, 100); } function onStop() { stopRecording(); } </script> <script type="text/javascript" src="stream.js"></script> </body> </html>